3.17-stable review patch. If anyone has any objections, please let me know.
------------------ From: Takashi Iwai <[email protected]> commit 3b70bdba2fcb374a2235a56ab73334348d819579 upstream. CMI8888 shows the stuttering playback when the snooping is disabled on the audio buffer. Meanwhile, we've got reports that CORB/RIRB doesn't work in the snooped mode. So, as a compromise, disable the snoop only for CORB/RIRB and enable the snoop for the stream buffers. The resultant patch became a bit ugly, unfortunately, but we still can live with it. Reported-and-tested-by: Geoffrey McRae <[email protected]> Signed-off-by: Takashi Iwai <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- sound/pci/hda/hda_intel.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -373,6 +373,8 @@ static void __mark_pages_wc(struct azx * #ifdef CONFIG_SND_DMA_SGBUF if (dmab->dev.type == SNDRV_DMA_TYPE_DEV_SG) { struct snd_sg_buf *sgbuf = dmab->private_data; + if (chip->driver_type == AZX_DRIVER_CMEDIA) + return; /* deal with only CORB/RIRB buffers */ if (on) set_pages_array_wc(sgbuf->page_table, sgbuf->pages); else @@ -1768,7 +1770,7 @@ static void pcm_mmap_prepare(struct snd_ #ifdef CONFIG_X86 struct azx_pcm *apcm = snd_pcm_substream_chip(substream); struct azx *chip = apcm->chip; - if (!azx_snoop(chip)) + if (!azx_snoop(chip) && chip->driver_type != AZX_DRIVER_CMEDIA) area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); #endif } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
